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TITLE :Samsung Electronics 64GB EVO Micro SDXC with Adapter Upto 48MB/s Class 10 Memory Card (MB MP64DA/AM) ASIN : B00IVPU7AO BRAND : Samsung PRICE: $44.89 If not sure !!!!!! Check !!!!! |
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Most helpful customer reviews
57 of 59 people found the following review helpful.
Great fast card. very good for phones and tablets due to high 4kb speeds
By Jenny Ramshaw
This is a very fast card, particularly suited to not only transferring files quickly but also running as a phone or tablet card for applications as well.
In phones and tablets one of the most important things is not just the transfer speed but also the IOPs that the card can deliver. Many class 10 cards have great transfer speeds but terrible and I mean terrible IOPs, often a 5 year old card easily out performs them in IOPs.
This card delivers in both areas, fast class 10 transfer speeds 23mb read, 15mb write but also 482 write IOPs and 1668 read IOPs.
That's IOP speeds that are slower than an SSD but way faster than a hard disk. Bare in mind that some class 10 cards give 4 write IOPs and you can see why I'm impressed. The only card I have seen outperform it in IOPs it the SanDisk Extreme Pro and they are seriously expensive and not available in 64gb. Testing against the third SanDisk I have, a 32gb ultra, is almost funny as the ultra only gives 15 write IOPs under the same conditions, making this card 30 times faster.
What does this mean for normal use, well it translates into an excellent general purpose card, that even if it doesn't have the official fastest transfer speeds will actually perform much better in the real world. Which is why its getting such rave reviews on here for speed (so long as you get a genuine one!)
This was tested in my Dell Venue 8 tablet using the built in card reader. For the techies (if you've got this far then I assume you are)I am actually using it to run Server 2012 virtual machines in VMWare workstation and the performance is surprisingly good, I would even call it snappy!
Full Crystalmark disk scores below.
Sequential read 23.66mbs write 16.03 mbps
512kb random read 23.25mbs write 15.67 mbps
4k random read 6.40mbps write 1.850 mbps
4k random qd32 6.65mbs write 1.92 mbps
Parameters 5 iterations 1000mb sample size.
Tested on the 64gb Samsung Evo microsdhc.
36 of 38 people found the following review helpful.
Great speed!!
By Giovanni Flores
Transferred over 350 songs in about 3 min from my Galaxy S5's internal memory to the sd card. No issues so far.
40 of 49 people found the following review helpful.
Fast Class 10
By Ludwig
I bought this after a Sandisk Class 10 card gave write errors in my dashcam. Benchmarks shows this writes up to 40 MByte/s (Class 10 calls for 10 MByte/s), and "typical" write speed is 16 MByte/s.
I can't figure out how to post a benchmark screenshot so here it is transcribed:
H2testw v1.4
writing speed 15.9 MBytes/s
reading speed 35.8 Mbytes/s
ATTO Disk Benchmark v2.47, default settings (Overlapped I/O, 0.5 to 8192 KB transfer size, total length 256 MB)
Size Write Read (KByte or KBytes/sec)
0.5 495 1397
1.0 605 2727
2.0 1983 7438
4.0 3624 12588
8.0 7092 19835
16.0 14760 27836
32.0 20827 29388
64.0 21140 29454
128.0 21209 29454
256.0 21434 29421
512.0 29337 36177
1024.0 34326 41045
2048.0 38022 44078
4096.0 40305 45964
8192.0 38791 46361
SD controller was laptop's builtin Ricoh PCIe SDXC/MMC Host Controller
